xserver_xorg-server: fix dependency with dbus

If dbus and udev are enabled. Xorg link with both:

$ arm-linux-readelf -d usr/bin/X | grep NEEDED
 0x00000001 (NEEDED)                     Shared library: [libdbus-1.so.3]
 0x00000001 (NEEDED)                     Shared library: [libpthread.so.0]
 0x00000001 (NEEDED)                     Shared library: [libudev.so.1]
[...]

Signed-off-by: Jérôme Pouiller <jezz@sysmic.org>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/x11r7/xserver_xorg-server/xserver_xorg-server.mk

@@ -168,12 +168,12 @@ XSERVER_XORG_SERVER_CONF_OPTS += --enable-config-udev-kms
 else
 XSERVER_XORG_SERVER_CONF_OPTS += --disable-config-udev-kms
 endif
-else
+endif
+
 ifeq ($(BR2_PACKAGE_DBUS),y)
 XSERVER_XORG_SERVER_DEPENDENCIES += dbus
 XSERVER_XORG_SERVER_CONF_OPTS += --enable-config-dbus
 endif
-endif
 
 ifeq ($(BR2_PACKAGE_FREETYPE),y)
 XSERVER_XORG_SERVER_DEPENDENCIES += freetype